Paint dripping process of motor stator winding

Abstract

The invention belongs to the technical field of motor production, and particularly provides a paint dripping process of a motor stator winding. The objective of the invention is to solve the problems of non-uniform filling of impregnating varnish in a stator slot and less paint hanging amount of a motor stator winding. Therefore, the paint dripping step of the paint dripping process of the motor stator winding sequentially comprises a first paint dripping stage and a second paint dripping stage, in the first paint dripping stage, the motor stator winding is obliquely arranged, the non-wire-outlet end is higher than the wire outlet end, and paint dripping is conducted on the outer ring of the non-wire-outlet end through a first dripping pipe and a third dripping pipe; the second dropper is used for carrying out paint dripping on the inner ring of the non-wire-outlet end; and in the second paint dripping stage, the motor stator winding is horizontally arranged, the first dropper and the second dropper respectively carry out paint dripping on the outer ring and the inner ring of the non-wire-outlet end, and the third dropper and the fourth dropper respectively carry out paint dripping on the inner ring and the outer ring of the wire-outlet end. According to the paint dripping process, the filling rate and the paint hanging amount of the impregnating varnish in the stator groove can be improved, and the performance of the motor stator is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of motor production, and specifically provides a paint dripping process for a motor stator winding. Background Art

[0002] After the stator of the motor is wound, the winding needs to be soaked in paint. The purpose of this is to remove the moisture contained in the insulating material and fill all the air gaps with insulating paint. This can not only improve the insulation strength and moisture resistance of the winding, but also improve the heat resistance and heat dissipation of the winding. It can also improve the mechanical properties, chemical stability, thermal conductivity, heat dissipation effect and delay aging of the winding insulation.

[0003] The quality of motor varnishing directly affects the temperature rise and service life of the motor. The winding varnishing methods mainly include varnishing and dripping. The current dripping process has problems such as uneven filling of the varnish in the stator slot and small amount of varnish, which affects the quality of the motor.

[0004] Accordingly, this field requires a new technical solution to solve the above technical problems. Summary of the invention

[0005] The present invention aims to solve the above technical problem, that is, to solve the problem of uneven filling of impregnating varnish in stator slots and small amount of varnish on motor stator windings.

[0006] The present invention provides a paint dripping process for a motor stator winding, wherein the paint dripping steps sequentially include a first paint dripping stage and a second paint dripping stage. In the first paint dripping stage, the motor stator winding is tilted and the non-outlet end of the motor stator winding is higher than the outlet end. The first dropper and the third dropper of the paint dripping equipment drip paint on the outer circle of the non-outlet end, and the first dropper and the third dropper are arranged at intervals along the length direction of the non-outlet end, and the second dropper of the paint dripping equipment drips paint on the inner circle of the non-outlet end; in the second paint dripping stage, the motor stator winding is horizontally arranged, the first dropper drips paint on the outer circle of the non-outlet end, the second dropper drips paint on the inner circle of the non-outlet end, the third dropper drips paint on the inner circle of the outlet end, and the fourth dropper of the paint dripping equipment drips paint on the outer circle of the outlet end.

[0007] In the preferred technical solution of the paint dripping process of the above-mentioned motor stator winding, when paint is dripped on the outer ring of the output terminal and the non-output terminal, the paint dripping position is located at the top of the outer ring of the motor stator winding; and / or, when paint is dripped on the inner ring of the output terminal and the non-output terminal, the paint dripping position is located at the bottom end of the inner ring of the motor stator winding.

[0008] In the preferred technical solution of the paint dripping process for the stator winding of the motor, in the first paint dripping stage and the second paint dripping stage, the first dripping pipe continuously drips paint on the outer ring of the non-outlet end.

[0009] In the preferred technical scheme of the paint dripping process of the above-mentioned motor stator winding, in the first paint dripping stage, the distance between the paint dripping point of the first paint dripper and the stator core is d1, 7mm≤d1≤12mm; and / or, in the second paint dripping stage, the first paint dripper is switched in turn between the first paint dripping position, the second paint dripping position and the third paint dripping position; wherein, d1 at the first paint dripping position is 9mm~11mm, and d1 at the second paint dripping position is greater than d1 at the first paint dripping position, d1 at the third paint dripping position is greater than d1 at the second paint dripping position, and d1 is the distance between the paint dripping point of the first paint dripper and the stator core.

[0010] In the preferred technical solution of the paint dripping process for the stator winding of the motor, in the first paint dripping stage and the second paint dripping stage, the second dripping pipe continuously drips paint on the inner ring of the non-outlet end.

[0011] In the preferred technical scheme of the paint dripping process of the above-mentioned motor stator winding, in the first paint dripping stage, the distance between the paint dripping point of the second paint dripper and the stator core is d2, 7mm≤d2≤12mm; and / or, in the second paint dripping stage, the second paint dripper is switched in turn at the fourth paint dripping position, the fifth paint dripping position and the sixth paint dripping position, wherein d2 at the fourth paint dripping position is 9mm~11mm, and d2 at the fifth paint dripping position is greater than d2 at the fourth paint dripping position, d2 at the sixth paint dripping position is greater than or equal to d2 at the fifth paint dripping position, and d2 is the distance between the paint dripping point of the second paint dripper and the stator core.

[0012] In the preferred technical solution of the paint dripping process of the above-mentioned motor stator winding, in the first paint dripping stage, the third dropper drips paint on the outer circle of the non-line end in an intermittent manner; in the second paint dripping stage, the third dropper continuously drips paint on the inner circle of the line end.

[0013] In the preferred technical solution of the paint dripping process of the above-mentioned motor stator winding, in the first paint dripping stage, the distance between the paint dripping point of the third dripper and the stator core is d3, 2mm≤d3≤3mm; in the second paint dripping stage, the third dripper is switched in the seventh paint dripping position, the eighth paint dripping position, the seventh paint dripping position, the ninth paint dripping position and the tenth paint dripping position in sequence, wherein d3 at the seventh paint dripping position is 9mm~11mm, d3 at the eighth paint dripping position is 2mm~3mm, the ninth paint dripping position is the middle position in the length direction of the inner ring of the outlet terminal, the tenth paint dripping position is the side of the inner ring of the outlet terminal away from the stator core, and d3 is the distance between the paint dripping point of the third dripper and the stator core.

[0014] In the preferred technical solution of the paint dripping process for the stator winding of the motor, in the second paint dripping stage, the fourth dripper continuously drips paint on the outer ring of the outlet terminal.

[0015] In the preferred technical solution of the paint dripping process of the above-mentioned motor stator winding, in the second paint dripping stage, the distance between the paint dripping point of the fourth dripper and the stator core is d4, and the fourth dripper moves from the initial paint dripping position to the final paint dripping position, wherein d4 at the initial paint dripping position is 2mm~3mm, and the final paint dripping position is the side of the outer ring of the outlet terminal away from the stator core.

[0016] In the preferred technical solution of the paint dripping process for the motor stator winding, in the first paint dripping stage, the inclination angle of the motor stator winding is in the range of 11° to 13°.

[0017] In the preferred technical scheme of the paint dripping process of the above-mentioned motor stator winding, the paint dripping flow rate V1 of the first dropper is in the range of 5g / min to 12g / min; and / or, the paint dripping flow rate V2 of the second dropper is in the range of 5g / min to 12g / min; and / or, the paint dripping flow rate V3 of the third dropper is in the range of 4g / min to 10g / min; and / or, the paint dripping flow rate V4 of the fourth dropper is in the range of 6g / min to 10g / min.

[0018] In the preferred technical solution of the paint dripping process of the above-mentioned motor stator winding, in the paint dripping step, the motor stator winding is heated by an electric heating device, and the temperature of the motor stator winding is in the range of 80°C to 90°C; and / or, in the paint dripping step, the rotation speed n of the motor stator winding is in the range of 15rpm to 25rpm.

[0019] In the case of adopting the above technical scheme, in the paint dripping process of the present invention, the paint dripping step includes a first paint dripping stage and a second paint dripping stage in sequence. In the first paint dripping stage, the motor stator winding is tilted, and the first dropper and the third dropper drip paint on the outer ring of the non-outgoing end of the motor stator winding at two positions respectively, and the second dropper drips paint on the inner ring of the non-outgoing end of the motor stator winding; in the second paint dripping stage, the motor stator winding is horizontally arranged, and the first dropper and the second dropper drip paint on the outer ring and the inner ring of the non-outgoing end respectively, and the third dropper and the fourth dropper drip paint on the inner ring and the outer ring of the outgoing end respectively; in this arrangement, the paint is first dripped on one end of the motor stator winding at an angle, so that the impregnating paint can flow and penetrate smoothly toward the other end of the motor stator winding, and finally the two ends are dripped at the same time horizontally, so that each area of ​​the motor stator winding is soaked with impregnating paint, so that the impregnating paint can be fully filled into the inside of the stator slot, thereby improving the filling rate and the amount of paint in the stator slot, thereby improving the performance of the motor stator.

[0020] Furthermore, when dripping paint on the outer rings of the output terminal and the non-output terminal, the paint is dripped on the top of the outer ring. In this way, as the stator rotates, the impregnating paint dripped onto the motor stator winding can better flow into the internal gaps of the motor stator winding and the stator slots, so as to penetrate smoothly into the stator slots, thereby improving the utilization rate of the impregnating paint and further improving the paint dripping effect.

[0021] Furthermore, when dripping paint on the inner rings of the output terminal and the non-output terminal, the paint is dripped on the bottom end of the inner ring. In this way, as the stator rotates, the impregnating paint dripped onto the motor stator winding can better flow into the internal gaps of the motor stator winding and the stator slots, so as to penetrate smoothly into the stator slots, thereby improving the utilization rate of the impregnating paint and further improving the paint dripping effect.

[0022] Furthermore, in the first paint dripping stage, the first dropper continuously drips paint on the outer ring of the non-line-outgoing end to provide a sufficient amount of impregnating paint to penetrate into the gaps and stator slots of the motor stator windings. In the second paint dripping stage, the first dropper continuously drips paint on the outer ring of the non-line-outgoing end, thereby dripping paint on the non-line-outgoing end area, so that the impregnating paint is fully filled into the gaps between the non-line-outgoing ends of the motor stator windings, thereby increasing the amount of paint on the non-line-outgoing ends.

[0023] Furthermore, in the first paint dripping stage, the distance between the paint dripping point of the first dripping tube and the stator core is 7 mm to 12 mm, and the paint is dripped at a certain distance from the stator core to improve the penetration and flow effect of the impregnating paint.

[0024] Furthermore, in the second paint dripping stage, the paint dripping position of the first dripper gradually moves toward the end of the non-outgoing line end away from the stator core, which can make the impregnating paint drip evenly, thereby increasing the amount of paint hanging at each position of the non-outgoing line end and ensuring the paint dripping effect.

[0025] Furthermore, in the first paint dripping stage, the second dropper continuously drips paint on the inner ring of the non-line-outgoing end to provide sufficient impregnating paint to penetrate into the gaps of the motor stator winding and the stator slots. In the second paint dripping stage, the second dropper continuously drips paint on the inner ring of the non-line-outgoing end, thereby dripping paint on the inner ring of the non-line-outgoing end area, so that the impregnating paint is fully filled into the gaps between the non-line-outgoing ends of the motor stator winding, thereby increasing the amount of paint on the non-line-outgoing ends.

[0026] Furthermore, in the first paint dripping stage, the third dropper intermittently drips paint on the outer circle of the non-outlet end, and is used in conjunction with the first dropper to further increase the amount of paint dripping, and drips paint from different positions to increase the amount of paint on the outer circle of the non-outlet end. In the second paint dripping stage, the third dropper continuously drips paint on the inner circle of the outlet end, which can provide sufficient impregnation paint for the outlet end to increase the amount of paint on the outlet end.

[0027] Furthermore, in the first paint dripping stage, the third dropper is closer to the stator core than the first dropper. The third dropper is used in conjunction with the first dropper to increase the amount of impregnating varnish, so that the impregnating varnish of the third dropper mainly penetrates the stator slots, thereby improving the filling rate of the impregnating varnish in the stator slots.

[0028] Furthermore, in the second paint dripping stage, the third dropper continues to drip paint on the inner circle of the outlet end, and the paint dripping position of the third dropper keeps changing, dripping paint on positions of different lengths of the outlet end respectively, which can make the impregnating paint evenly distributed, thereby increasing the amount of paint hanging at each position of the outlet end and ensuring the paint dripping effect.

[0029] Furthermore, in the second paint dripping stage, the fourth dropper continues to drip paint on the outer circle of the outlet end, and the paint dripping position of the fourth dropper keeps changing, dripping paint on positions of different lengths of the outlet end respectively, which can make the impregnating paint evenly distributed, thereby increasing the amount of paint hanging at each position of the outlet end and ensuring the paint dripping effect.

[0030] Furthermore, in the first paint dripping stage, the inclination angle of the motor stator winding is controlled at 11° to 13°. This setting can stabilize the flow rate of the dipping paint, reduce the overflow rate of the dipping paint, and thus increase the filling rate of the dipping paint in the stator slot.

[0031] Furthermore, the paint dripping flow rate of the first dropper is controlled at 5g / min to 12g / min, which can provide sufficient impregnating paint to infiltrate the gaps in the motor stator windings and the electronic slots, avoid excessive waste of impregnating paint, and improve the utilization rate of the impregnating paint.

[0032] Furthermore, the paint dripping flow rate of the second dropper is controlled at 5g / min to 12g / min, which can provide sufficient impregnating paint to infiltrate the gaps in the motor stator windings and the electronic slots, avoid excessive waste of impregnating paint, and improve the utilization rate of the impregnating paint.

[0033] Furthermore, the paint dripping flow rate of the third dropper is controlled at 4g / min to 10g / min, which can provide sufficient impregnating varnish to infiltrate the gaps in the motor stator windings and the electronic slots, avoid excessive waste of impregnating varnish, and improve the utilization rate of the impregnating varnish.

[0034] Furthermore, the paint dripping flow rate of the fourth dropper is controlled at 6g / min to 10g / min, which can provide sufficient impregnating paint to infiltrate the gaps in the motor stator windings and the electronic slots, avoid excessive waste of impregnating paint, and improve the utilization rate of the impregnating paint.

[0035] Furthermore, in the paint dripping step, an electric heating device is used to heat the motor stator winding so that the temperature of the motor stator winding is maintained at 80°C to 90°C. With this arrangement, the temperature of the motor stator winding is uniform, and the impregnating paint maintains a stable temperature, so that it maintains a stable viscosity, thereby improving the flow and wetting effect of the impregnating paint, and further ensuring the performance of the motor stator.

[0036] Furthermore, in the paint dripping step, the rotation speed of the motor stator winding is maintained at 15rpm to 25rpm, which can make the impregnating varnish flow steadily, prevent the impregnating varnish from overflowing and being thrown out, and enable the impregnating varnish to more easily penetrate into the internal pores and stator slots of the motor stator winding, thereby increasing the filling rate of the impregnating varnish in the stator slot and ensuring the performance of the motor stator.

[0037] 1. A paint dripping process for a motor stator winding, characterized in that the paint dripping step includes a first paint dripping stage and a second paint dripping stage in sequence,

[0038] In the first paint dripping stage, the motor stator winding is arranged at an angle and the non-outlet end of the motor stator winding is higher than the outlet end, the first dripper and the third dripper of the paint dripping device drip paint on the outer circle of the non-outlet end, and the first dripper and the third dripper are arranged at intervals along the length direction of the non-outlet end, and the second dripper of the paint dripping device drips paint on the inner circle of the non-outlet end;

[0039] In the second paint dripping stage, the motor stator winding is arranged horizontally, the first dropper drips paint on the outer circle of the non-outlet end, the second dropper drips paint on the inner circle of the non-outlet end, the third dropper drips paint on the inner circle of the outlet end, and the fourth dropper of the paint dripping device drips paint on the outer circle of the outlet end.

[0040] 2. The paint dripping process for the motor stator winding according to solution 1 is characterized in that when the paint is dripped on the outer ring of the outlet terminal and the non-outlet terminal, the paint dripping position is located at the top of the outer ring of the motor stator winding;

[0041] And / or, when the paint is dripped on the inner ring of the outlet terminal and the non-outlet terminal, the paint dripping position is located at the bottom end of the inner ring of the motor stator winding.

[0042] 3. The paint dripping process for the motor stator winding according to Scheme 1 is characterized in that in the first paint dripping stage and the second paint dripping stage, the first dripping tube continuously drips paint on the outer ring of the non-outlet end.

[0043] 4. The paint dripping process for the motor stator winding according to solution 3 is characterized in that, in the first paint dripping stage, the distance between the paint dripping point of the first dripping tube and the stator core is d1, 7mm≤d1≤12mm;

[0044] And / or, in the second paint dripping stage, the first paint dripping tube is switched in turn between the first paint dripping position, the second paint dripping position and the third paint dripping position; wherein, d1 at the first paint dripping position is 9mm~11mm, and d1 at the second paint dripping position is greater than d1 at the first paint dripping position, d1 at the third paint dripping position is greater than d1 at the second paint dripping position, and d1 is the distance between the paint dripping point of the first paint dripping tube and the stator core.

[0045] 5. The paint dripping process for the motor stator winding according to Scheme 1 is characterized in that in the first paint dripping stage and the second paint dripping stage, the second dripping tube continuously drips paint on the inner ring of the non-output terminal.

[0046] 6. The paint dripping process for the motor stator winding according to solution 5 is characterized in that, in the first paint dripping stage, the distance between the paint dripping point of the second dripping tube and the stator core is d2, 7mm≤d2≤12mm;

[0047] And / or, in the second paint dripping stage, the second paint dripping tube is switched in turn between the fourth paint dripping position, the fifth paint dripping position and the sixth paint dripping position, wherein d2 at the fourth paint dripping position is 9 mm to 11 mm, and d2 at the fifth paint dripping position is greater than d2 at the fourth paint dripping position, d2 at the sixth paint dripping position is greater than or equal to d2 at the fifth paint dripping position, and d2 is the distance between the paint dripping point of the second paint dripping tube and the stator core.

[0048] 7. The paint dripping process for the motor stator winding according to solution 1 is characterized in that, in the first paint dripping stage, the third dripping pipe drips paint on the outer ring of the non-outlet end in an intermittent manner;

[0049] In the second paint dripping stage, the third dripping tube continues to drip paint on the inner circle of the outlet end.

[0050] 8. The paint dripping process for the motor stator winding according to solution 7 is characterized in that, in the first paint dripping stage, the distance between the paint dripping point of the third dripping tube and the stator core is d3, 2mm≤d3≤3mm;

[0051] And / or, in the second paint dripping stage, the third paint dripping tube is switched in sequence at the seventh paint dripping position, the eighth paint dripping position, the seventh paint dripping position, the ninth paint dripping position and the tenth paint dripping position, wherein d3 at the seventh paint dripping position is 9mm~11mm, d3 at the eighth paint dripping position is 2mm~3mm, the ninth paint dripping position is the middle position in the length direction of the inner ring of the outlet terminal, the tenth paint dripping position is the side of the inner ring of the outlet terminal away from the stator core, and d3 is the distance between the paint dripping point of the third paint dripping tube and the stator core.

[0052] 9. The paint dripping process for the motor stator winding according to Scheme 1 is characterized in that, in the second paint dripping stage, the fourth dripper continuously drips paint on the outer ring of the outlet terminal.

[0053] 10. The paint dripping process for the motor stator winding according to Scheme 9 is characterized in that, in the second paint dripping stage, the distance between the paint dripping point of the fourth dripper and the stator core is d4, and the fourth dripper moves from an initial paint dripping position to a final paint dripping position, wherein d4 at the initial paint dripping position is 2mm to 3mm, and the final paint dripping position is the side of the outer ring of the outlet terminal away from the stator core.

[0054] 11. The paint dripping process for the motor stator winding according to Scheme 1 is characterized in that, in the first paint dripping stage, the inclination angle of the motor stator winding is in the range of 11° to 13°.

[0055] 12. The paint dripping process for the motor stator winding according to any one of schemes 1 to 11, characterized in that the paint dripping flow rate V1 of the first dripping pipe ranges from 5 g / min to 12 g / min;

[0056] and / or, the paint dripping flow rate V2 of the second dripping tube is in the range of 5 g / min to 12 g / min;

[0057] and / or, the paint dripping flow rate V3 of the third dripping tube ranges from 4 g / min to 10 g / min;

[0058] And / or, the paint dripping flow rate V4 of the fourth dripping tube ranges from 6 g / min to 10 g / min.

[0059] 13. The paint dripping process for the motor stator winding according to any one of schemes 1 to 11, characterized in that, in the paint dripping step, an electric heating device is used to heat the motor stator winding, and the temperature of the motor stator winding is in the range of 80° C. to 90° C.;

[0060] And / or, in the paint dripping step, the speed n of the motor stator winding is in the range of 15 rpm to 25 rpm. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0062] Figure 1 It is a schematic diagram of the relative positions of the dripping pipe and the motor stator in the first paint dripping stage in the paint dripping process of the present invention;

[0063] Figure 2 It is a schematic diagram of the relative positions of the dripping pipe and the motor stator in the second paint dripping stage in the paint dripping process of the present invention.

[0064] Reference numerals list :

[0065] 11. stator core; 12. motor stator winding; 121. non-outgoing terminal; 122. outgoing terminal;

[0066] 21. First dropper; 22. Second dropper; 23. Third dropper; 24. Fourth dropper. DETAILED DESCRIPTION

[0067] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0068] It should be noted that in the description of the present invention, the terms "top end", "bottom end" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0069] Specifically, the paint dripping process of the motor stator winding of the present invention includes preheating, paint dripping, gelling and curing in sequence.

[0070] The paint dripping step includes a first paint dripping stage and a second paint dripping stage in sequence.

[0071] During the first paint dripping stage, refer to Figure 1 The motor stator winding 12 is tilted, and the non-outlet end 121 of the motor stator winding 12 is higher than the outlet end 122. The first dropper 21 and the third dropper 23 of the paint dripping device drip paint on the outer circle of the non-outlet end 121, and the first dropper 21 and the third dropper 23 are spaced apart along the length direction of the non-outlet end 121. The second dropper 22 of the paint dripping device drips paint on the inner circle of the non-outlet end 121.

[0072] During the second paint dripping phase, refer to Figure 2 The motor stator winding 12 is arranged horizontally, the first dropper 21 drops paint on the outer circle of the non-outgoing terminal 121, the second dropper 22 drops paint on the inner circle of the non-outgoing terminal 121, the third dropper 23 drops paint on the inner circle of the outgoing terminal 122, and the fourth dropper 24 of the paint dripping device drops paint on the outer circle of the outgoing terminal 122.

[0073] The paint dripping step of the paint dripping process of the present invention is divided into a first paint dripping stage and a second paint dripping stage. In the first paint dripping stage, the motor stator winding 12 is tilted, and the first dropper 21 and the third dropper 23 drip paint on the outer circle of the non-outlet terminal 121 at two positions respectively, and the second dropper 22 drips paint on the inner circle of the non-outlet terminal 121 at the same time, disperses the paint dripping positions, and drips paint on the inner circle and the outer circle of the motor stator winding 12 at the same time, which can improve the penetration of the impregnating paint, allow more impregnating paint to penetrate into the stator slot, improve the filling rate of the impregnating paint in the stator slot, and increase the amount of paint hanging on the stator slot and the motor stator winding 12, thereby improving the performance of the motor stator. In the second paint dripping stage, the motor stator winding 12 is arranged horizontally, the first dropper 21 and the second dropper 22 drip paint on the outer ring and the inner ring of the non-outlet terminal 121 respectively, and the third dropper 23 and the fourth dropper 24 drip paint on the inner ring and the outer ring of the outlet terminal 122 respectively, to ensure that the motor stator winding 12 on the outside of the stator slot can also be evenly painted, thereby improving the paint dripping effect and ensuring the performance of the motor stator.

[0074] In the first paint dripping stage, the motor stator winding 12 is tilted, such as Figure 1 As shown, an angle α is formed between the motor stator winding 12 and the horizontal plane. After the impregnation varnish is dripped onto the motor stator winding 12, the impregnation varnish can flow along the length direction of the motor stator winding 12 while penetrating downward, so that the impregnation varnish is more evenly distributed and fully filled into the stator slots and the gaps of the motor stator winding 12, thereby improving the dripping effect. In the second dripping stage, the motor stator winding 12 is placed horizontally, as shown in FIG. Figure 2 Continuing to drip paint as shown can increase the amount of dipping paint in the gap between the stator slot and the motor stator winding 12, thereby improving the paint dripping effect.

[0075] Preferably, see Figure 1 and Figure 2 When the outer rings of the outlet terminal 122 and the non-outlet terminal 121 are dripped with paint, the paint dripping positions are all the top of the outer ring of the motor stator winding 12. The top of the outer ring of the motor stator winding 12 refers to the highest point position of the outer circle on the vertical section of the motor stator winding 12.

[0076] Paint is dripped on the top of the outer ring of the motor stator winding 12. After the impregnating paint is dripped onto the outer ring of the motor stator winding 12, the impregnating paint can flow downward and penetrate under the action of its own gravity, that is, penetrate toward the inner ring of the motor stator winding 12, thereby entering the gap of the motor stator winding 12 and the stator slot of the stator core 11, which helps to improve the impregnation effect of the impregnating paint.

[0077] Preferably, see Figure 1 and Figure 2 When the inner circles of the outlet terminal 122 and the non-outlet terminal 121 are dripped with paint, the dripping position is the bottom end of the inner circle of the motor stator winding 12. The bottom end of the inner circle of the motor stator winding 12 refers to the lowest point of the inner circle on the vertical section of the motor stator winding 12.

[0078] Paint is dripped on the bottom end of the inner ring of the motor stator winding 12. After the impregnating paint is dripped onto the inner ring of the motor stator winding 12, the impregnating paint can flow downward and penetrate under the action of its own gravity, that is, penetrate toward the outer ring of the motor stator winding 12, thereby entering the gap of the motor stator winding 12 and the stator slot of the stator core 11, which helps to improve the impregnation effect of the impregnating paint.

[0079] Preferably, in the first paint dripping stage and the second paint dripping stage, the first dripping tube 21 continuously drips paint on the outer ring of the non-outlet terminal 121. Continuous paint dripping can provide sufficient impregnation paint for the stator winding 12 of the motor.

[0080] In other embodiments, the first dropper 21 may also be configured to drip paint on the outer circle of the non-outlet end 121 in an intermittent manner.

[0081] The above adjustment and change of the specific paint dripping mode of the first dropper 21 does not deviate from the basic principle of the present invention and should be limited within the protection scope of the present invention. Of course, it is preferred that the first dropper 21 drips paint continuously to ensure sufficient dipping paint to ensure the dripping effect.

[0082] Preferably, in the first paint dripping stage, the distance between the paint dripping point of the first dripping tube 21 and the stator core 11 is d1, and 7mm≤d1≤12mm.

[0083] The first dropper 21 drips paint at a position 7 to 12 mm away from the stator core, so that the impregnating paint can penetrate well into the stator slots. The flow and penetration of the impregnating paint are not restricted by the slot insulation paper, thereby ensuring the paint dripping effect.

[0084] Preferably, in the second paint dripping stage, the first paint dripping tube 21 switches successively between the first paint dripping position, the second paint dripping position and the third paint dripping position; wherein, d1 at the first paint dripping position is 9mm~11mm, and d1 at the second paint dripping position is greater than d1 at the first paint dripping position, d1 at the third position is greater than d1 at the second paint dripping position, and d1 is the distance between the paint dripping point of the first paint dripping tube 21 and the stator core 11.

[0085] In the second paint dripping stage, the paint dripping position of the first dripping tube 21 is constantly changed, and the paint can be evenly dripped on each area of ​​the non-outlet end 121, thereby increasing the amount of paint hanging on each position of the non-outlet end 121 and ensuring the paint dripping effect.

[0086] Preferably, in the first paint dripping stage and the second paint dripping stage, the second dripping tube 22 continuously drips paint on the inner circle of the non-outlet end 121 .

[0087] In other embodiments, the second drip tube 22 may also be configured to drip paint on the outer circle of the non-outlet end 121 in an intermittent manner.

[0088] The above adjustment and change of the specific paint dripping mode of the second dropper 22 does not deviate from the basic principle of the present invention and should be limited within the protection scope of the present invention. Of course, it is preferred that the second dropper 22 drips paint continuously to ensure sufficient dipping paint to ensure the paint dripping effect.

[0089] Preferably, in the first paint dripping stage, the distance between the paint dripping point of the second dripping tube 22 and the stator core 11 is d2, and 7mm≤d2≤12mm.

[0090] The second dropper 22 drips paint at a position 7 to 12 mm away from the stator core, which enables the impregnation paint to penetrate well into the stator slots, thereby ensuring the paint dripping effect and improving the performance of the motor stator.

[0091] Preferably, in the second paint dripping stage, the second paint dripping tube 22 is switched in sequence between the fourth paint dripping position, the fifth paint dripping position and the sixth paint dripping position, wherein d2 at the fourth paint dripping position is 9 mm to 11 mm, and d2 at the fifth paint dripping position is greater than d2 at the fourth paint dripping position, d2 at the sixth paint dripping position is greater than or equal to d2 at the fifth paint dripping position, and d2 is the distance between the paint dripping point of the second paint dripping tube 22 and the stator core 11.

[0092] In the second paint dripping stage, the paint dripping position of the second dripping tube 22 is constantly changed, and the paint can be evenly dripped on each area of ​​the non-outlet end 121, thereby increasing the amount of paint hanging on each position of the non-outlet end 121 and ensuring the paint dripping effect.

[0093] Preferably, in the first paint dripping stage, the third dripping tube 23 drips paint on the outer circle of the non-outlet end 121 in an intermittent manner; in the second paint dripping stage, the third dripping tube 23 continuously drips paint on the inner circle of the outlet end 122 .

[0094] In the first paint dripping stage, the third dropper 23 intermittently drips paint on the outer circle of the non-outlet terminal 121, and cooperates with the first dropper 21 to provide a sufficient amount of dipping paint. In the second paint dripping stage, the third dropper 23 continuously drips paint on the inner circle of the outlet terminal 122, and can provide enough dipping paint for the outlet terminal 122 to ensure the paint dripping effect.

[0095] Preferably, in the first paint dripping stage, the distance between the paint dripping point of the third dripping tube 23 and the stator core 11 is d3, and 2mm≤d3≤3mm.

[0096] The third dropper 23 drips paint at a position 2 to 3 mm away from the stator core, so that the impregnating paint can be dripped onto the slot insulation paper and cover the slot insulation paper, thereby improving the overall insulation performance of the motor stator and ensuring the paint dripping effect.

[0097] Preferably, in the second paint dripping stage, the third paint dripping tube 23 switches in sequence at the seventh paint dripping position, the eighth paint dripping position, the seventh paint dripping position, the ninth paint dripping position and the tenth paint dripping position, wherein d3 at the seventh paint dripping position is 9mm~11mm, d3 at the eighth paint dripping position is 2mm~3mm, the ninth paint dripping position is the middle position in the length direction of the inner ring of the outlet terminal 122, the tenth paint dripping position is the side of the inner ring of the outlet terminal 122 away from the stator core 11, and d3 is the distance between the paint dripping point of the third paint dripping tube 23 and the stator core 11.

[0098] In the second paint dripping stage, the paint dripping position of the third dripping tube 23 is constantly changed, and the paint can be evenly dripped on each area of ​​the inner circle of the outlet terminal 122, thereby increasing the amount of paint hanging at each position of the outlet terminal 122 and ensuring the paint dripping effect.

[0099] Preferably, in the second paint dripping stage, the fourth dripping tube 24 continues to drip paint on the outer circle of the outlet terminal 122 .

[0100] In the second paint dripping stage, the fourth dripping tube 24 continuously drips paint on the outer circle of the outlet terminal 122, and can provide sufficient dipping paint for the outlet terminal 122 to ensure the paint dripping effect.

[0101] Preferably, in the second paint dripping stage, the distance between the paint dripping point of the fourth dripper 24 and the stator core 11 is d4, and the fourth dripper 24 moves from the initial paint dripping position to the final paint dripping position, wherein d4 at the initial paint dripping position is 2mm~3mm, and the final paint dripping position is the side of the outer ring of the outlet terminal 122 away from the stator core 11.

[0102] In the second paint dripping stage, the paint dripping position of the fourth dripping tube 24 is constantly changed, and the paint can be evenly dripped on each area of ​​the outer circle of the outlet terminal 122, thereby increasing the amount of paint hanging at each position of the outlet terminal 122 and ensuring the paint dripping effect.

[0103] Preferably, in the first paint dripping stage, the inclination angle of the motor stator winding 12 is in the range of 11° to 13°, that is, 11°≤α≤13°. Controlling the inclination angle of the motor stator winding 12 to 11° to 13° can make the impregnation varnish flow stably, reduce the overflow rate of the impregnation varnish, and thus improve the filling rate of the impregnation varnish in the stator slot.

[0104] Preferably, the paint dripping flow rate V1 of the first dripping tube 21 is 5 g / min to 12 g / min.

[0105] Preferably, the paint dripping flow rate V2 of the second dripping tube 22 is 5 g / min to 12 g / min.

[0106] Preferably, the paint dripping flow rate V3 of the third dripping tube 23 is 4 g / min to 10 g / min.

[0107] Preferably, the paint dripping flow rate V4 of the fourth dripping tube 24 is 6 g / min to 10 g / min.

[0108] Preferably, in the step of dripping paint, the motor stator winding 12 is heated by an electric heating device, and the temperature of the motor stator winding 12 is in the range of 80°C to 90°C. The motor stator winding 12 is heated by an electric heating device, and the temperature of the motor stator winding 12 is controlled at 80°C to 90°C. The temperature of the motor stator winding 12 is uniform, which can keep the dipping paint at a stable viscosity and temperature, ensure the flow effect and infiltration effect of the dipping paint, and thus ensure the performance of the motor stator.

[0109] Preferably, in the step of dripping paint, the speed n of the motor stator winding 12 is in the range of 15 rpm to 25 rpm. The speed of the motor stator winding 12 is controlled at 15 to 25 rpm, which can ensure the stable flow of the impregnation paint, prevent the impregnation paint from overflowing and being thrown out, and make it easier for the impregnation paint to penetrate into the internal gap of the motor stator winding 12 and the stator slot, thereby improving the filling rate of the impregnation paint in the stator slot and ensuring the performance of the motor stator.

[0110] The paint dripping process of the motor stator winding of the present invention is specifically described below through two specific embodiments.

[0111] Example 1

[0112] The motor stator winding of this embodiment is prepared by the following process steps:

[0113] S1: preheating, installing the motor stator winding on the paint dripping equipment, and using the electric heating device to preheat the motor winding, so that the motor stator winding is kept at a set preheating temperature to remove moisture in the motor stator winding and keep the motor stator winding dry. In this embodiment, the preheating temperature is set to 140° C. The set preheating temperature can be adjusted according to the actual process, for example, the set preheating temperature can also be set to 130° C. or 135° C.

[0114] S2: paint dripping, the motor stator winding rotates continuously at a speed of 22rpm, and the electric heating equipment heats the motor stator winding to keep the motor stator winding between 80℃ and 90℃.

[0115] Among them, in the first paint dripping stage of 0 to 650s, the motor stator winding is tilted, and its tilt angle α is 12°. The non-outgoing end of the motor stator winding is higher than the outgoing end, and the first dropper continuously drips paint on the outer ring of the non-outgoing end. The paint dripping flow rate V1 of the first dropper is 12g / min, and the distance d1 between the first dropper and the stator core is 8mm; the second dropper continuously drips paint on the inner ring of the non-outgoing end, the paint dripping flow rate V2 of the second dropper is 12g / min, and the distance d2 between the second dropper and the stator core is 8mm; the third dropper drips paint on the outer ring of the non-outgoing end in the time periods of 0 to 100s, 200 to 230s, 300 to 320s, 400 to 420s and 500 to 520s, the paint dripping flow rate V3 of the third dropper is 5.5g / min, and the distance d3 between the third dropper and the stator core is 2mm.

[0116] In the second paint dripping stage of 650 to 1040 s, the motor stator winding is set horizontally, and the first dropper continuously drips paint on the outer ring of the non-outgoing line end. The paint dripping flow rate V1 of the first dropper is 6 g / min, wherein, paint dripping is performed at the first paint dripping position for 650 to 850 s, at this time, d1 is 10 mm, paint dripping is performed at the second paint dripping position for 850 to 960 s, and the second paint dripping position is the middle position in the length direction of the non-outgoing line end, and paint dripping is performed at the third paint dripping position for 960 to 1040 s, and the third paint dripping position is the side of the non-outgoing line end away from the stator core.

[0117] The second dropper continuously drips paint on the inner circle of the non-line end, and the paint dripping flow rate V2 of the second dropper is 6g / min, wherein, paint is dripped at the fourth paint dripping position for 650-850s, at this time, d2 is 10mm, paint is dripped at the fifth paint dripping position for 850-960s, at this time, d2 is 25mm, and paint is dripped at the sixth paint dripping position for 960-1040s, at this time, d2 is 25mm.

[0118] The third dropper continuously drips paint on the inner circle of the outlet end, and the paint dripping flow rate V3 of the third dropper is 7.5g / min, wherein, paint is dripped at the seventh paint dripping position for 650-720s and 740-850s, at this time, d3 is 10mm, paint is dripped at the eighth paint dripping position for 720-740s, at this time, d3 is 2mm, paint is dripped at the ninth paint dripping position for 850-960s, and the ninth paint dripping position is located in the middle of the length direction of the outlet end, paint is dripped at the tenth paint dripping position for 960-1040s, and the tenth paint dripping position is located on the side of the outlet end away from the stator core.

[0119] The fourth dropper continuously drips paint on the outer circle of the outlet end, and the paint dripping flow rate V4 of the fourth dropper is 9g / min, wherein, paint dripping is performed at the initial paint dripping position for 650-710s, wherein d4 is 2mm, paint dripping is performed at the first middle paint dripping position for 710-850s, at this time, d4 is 10mm, paint dripping is performed at the second middle paint dripping position for 850-940s, and the second middle paint dripping position is the middle position in the length direction of the outlet end, and paint dripping is performed at the ending paint dripping position for 940-1040s, and the ending paint dripping position is the side of the outlet end away from the stator core, and d4 is the distance from the paint dripping point of the fourth dropper to the stator core.

[0120] S3: Gel.

[0121] S4: Curing.

[0122] Example 2

[0123] The motor stator winding of this embodiment is prepared by the following process steps:

[0124] S1: preheating, installing the motor stator winding on the paint dripping equipment, and using the electric heating device to preheat the motor winding, so that the motor stator winding is kept at a set preheating temperature to remove moisture in the motor stator winding and keep the motor stator winding dry. In this embodiment, the preheating temperature is set to 140° C. The set preheating temperature can be adjusted according to the actual process, for example, the set preheating temperature can also be set to 130° C. or 135° C.

[0125] S2: Paint dripping, the motor stator winding rotates continuously at a speed of 19 rpm, and the electric heating equipment heats the motor stator winding to keep the motor stator winding between 80℃ and 90℃.

[0126] Among them, in the first paint dripping stage of 0 to 850 s, the motor stator winding is tilted, and its tilt angle α is 13°. The non-outgoing end of the motor stator winding is higher than the outgoing end. The first dropper continuously drips paint on the outer ring of the non-outgoing end, the paint dripping flow rate V1 of the first dropper is 11 g / min, and the distance d1 between the first dropper and the stator core is 10 mm; the second dropper continuously drips paint on the inner ring of the non-outgoing end, the paint dripping flow rate V2 of the second dropper is 11 g / min, and the distance d2 between the second dropper and the stator core is 10 mm; the third dropper drips paint on the outer ring of the non-outgoing end in the time periods of 0 to 40 s, 100 to 140 s, 200 to 230 s, 300 to 330 s, 400 to 430 s and 580 to 620 s, the paint dripping flow rate V3 of the third dropper is 4.5 g / min, and the distance d3 between the third dropper and the stator core is 2 mm.

[0127] In the second paint dripping stage of 850 to 1230 s, the motor stator winding is set horizontally, and the first dropper continuously drips paint on the outer ring of the non-output end. The paint dripping flow rate V1 of the first dropper is 7 g / min, wherein, paint dripping is performed at the first paint dripping position from 850 to 1040 s, at this time, d1 is 10 mm; paint dripping is performed at the second paint dripping position from 1040 to 1120 s, at this time, d1 is 20 mm; paint dripping is performed at the third paint dripping position from 1120 to 1170 s, at this time, d1 is 27 mm.

[0128] The second dropper continuously drips paint on the inner circle of the non-outlet end, and the paint dripping flow rate V2 of the second dropper is 7g / min. Among them, 850-1040s are used to drip paint at the fourth paint dripping position, at this time, d2 is 10mm, 1040-1120s are used to drip paint at the fifth paint dripping position, at this time, d2 is 20mm, and 1120-1170s are used to drip paint at the sixth paint dripping position, at this time, d2 is 27mm;

[0129] The third dropper continuously drips paint on the inner ring of the outlet, and the paint dripping flow rate V3 of the third dropper is 9.5g / min, wherein, 850-965s and 985-1040s are used to drip paint at the seventh paint dripping position, at which time d3 is 10mm, 965-985s are used to drip paint at the eighth paint dripping position, at which time d3 is 2mm, 1040-1120s are used to drip paint at the ninth paint dripping position, which is located in the middle of the length direction of the outlet, and 1120-1230s are used to drip paint at the tenth paint dripping position, which is located on the side of the outlet away from the stator core;

[0130] The fourth dropper continuously drips paint on the outer circle of the outlet end, and the paint dripping flow rate V4 of the fourth dropper is 7.5g / min, wherein, paint dripping is performed at the initial paint dripping position for 850-940s, wherein d4 is 2mm, paint dripping is performed at the first middle paint dripping position for 940-1040s, at this time, d4 is 10mm, paint dripping is performed at the second middle paint dripping position for 1040-1120s, and the second middle paint dripping position is the middle position in the length direction of the outlet end, and paint dripping is performed at the ending paint dripping position for 1120-1230s, and the ending paint dripping position is the side of the outlet end away from the stator core, and d4 is the distance from the paint dripping point of the fourth dropper to the stator core.

[0131] S3: Gel.

[0132] S4: Curing.

[0133] Example 3

[0134] The steps of the preparation process of this embodiment are the same as those of Embodiment 1, the only difference being that the inclination angle of the motor stator winding in the paint dripping step is different. In this embodiment, α is 11°, that is, the angle between the motor stator winding and the horizontal plane is 11°.

[0135] Example 4

[0136] The steps of the preparation process of this embodiment are the same as those of Embodiment 1, and the only difference is that the inclination angle of the motor stator winding in the paint dripping step is different. In this embodiment, α is 12°, that is, the angle between the motor stator winding and the horizontal plane is 12°.

[0137] Example 5

[0138] The steps of the preparation process of this comparative example are the same as those of Example 1, the only difference being that the speed n of the motor stator winding in the paint dripping step is different. In this comparative example, n is 15 rpm.

[0139] Example 6

[0140] The steps of the preparation process of this comparative example are the same as those of Example 1, the only difference being that the speed n of the motor stator winding in the paint dripping step is different. In this comparative example, n is 25 rpm.

[0141] Comparative Example 1

[0142] The motor stator winding of this comparative example is prepared by the following process steps:

[0143] 1. Preheating: Install the motor stator winding on the paint dripping equipment and use an electric heating device to preheat the motor winding to keep the motor stator winding at a set preheating temperature to remove moisture in the motor stator winding and keep the motor stator winding dry. In this embodiment, the preheating temperature is set to 140°C.

[0144] 2. Paint dripping, the motor stator winding rotates continuously at a speed of 22rpm, and the electric heating equipment heats the motor stator winding to keep the motor stator winding between 80℃ and 90℃.

[0145] Among them, in the first paint dripping stage of 0 to 650s, the motor stator winding is tilted, and its tilt angle α is 12°. The first dropper and the second dropper continue to drip paint on the top of the outer ring of the non-outlet end. The paint dripping flow rate V1 of the first dropper is 12g / min, and the distance between the first dropper and the stator core is 8mm. The paint dripping flow rate V2 of the second dropper is 12g / min, and the distance between the second dropper and the stator core is 2mm.

[0146] In the second paint dripping stage of 650 to 1040 s, the motor stator winding is placed horizontally, and the first dropper continuously drips paint on the top of the outer ring of the non-outgoing line end. The paint dripping flow rate V1 of the first dropper is 6 g / min, wherein, paint dripping is performed at the first paint dripping position for 650 to 850 s, at which time d1 is 10 mm, paint dripping is performed at the second paint dripping position for 850 to 960 s, and the second paint dripping position is the middle position in the length direction of the non-outgoing line end, and paint dripping is performed at the third paint dripping position for 960 to 1040 s, and the third paint dripping position is the side of the non-outgoing line end away from the stator core, and d1 is the distance from the paint dripping point of the first dropper to the stator core. The second dropper drips paint on the top of the outer ring of the outlet end, and the paint dripping flow rate V2 of the second dropper is 12g / min, wherein, paint dripping is performed at the initial paint dripping position for 650-710s, wherein d4 is 2mm, paint dripping is performed at the first middle paint dripping position for 710-850s, at this time, d4 is 10mm, paint dripping is performed at the second middle paint dripping position for 850-940s, and the second middle paint dripping position is the middle position in the length direction of the outlet end, and paint dripping is performed at the ending paint dripping position for 940-1040s, and the ending paint dripping position is the side of the outlet end away from the stator core, and d4 is the distance from the paint dripping point of the fourth dropper to the stator core.

[0147] 3. Gel.

[0148] 4. Curing.

[0149] Comparative Example 2

[0150] The motor stator winding of this comparative example is prepared by the following process steps:

[0151] 1. Preheating: Install the motor stator winding on the paint dripping equipment and use an electric heating device to preheat the motor winding to keep the motor stator winding at a set preheating temperature to remove moisture in the motor stator winding and keep the motor stator winding dry. In this embodiment, the preheating temperature is set to 140°C.

[0152] 2. Paint dripping, the motor stator winding rotates continuously at a speed of 22rpm, and the electric heating equipment heats the motor stator winding to keep the motor stator winding between 80℃ and 90℃.

[0153] Among them, in the first paint dripping stage of 0 to 650s, the motor stator winding is tilted, and its tilt angle α is 12°. The first dropper and the second dropper continue to drip paint on the bottom end of the inner ring of the non-outlet end. The paint dripping flow rate V1 of the first dropper is 12g / min, and the distance between the first dropper and the stator core is 8mm. The paint dripping flow rate V2 of the second dropper is 12g / min, and the distance between the second dropper and the stator core is 2mm.

[0154] In the second paint dripping stage of 650 to 1040 s, the motor stator winding is placed horizontally, and the first dropper continuously drips paint on the bottom end of the inner ring of the non-outgoing line end. The paint dripping flow rate V1 of the first dropper is 6 g / min, wherein, paint dripping is performed at the first paint dripping position for 650 to 850 s, at which time d1 is 10 mm, paint dripping is performed at the second paint dripping position for 850 to 960 s, and the second paint dripping position is the middle position in the length direction of the non-outgoing line end, and paint dripping is performed at the third paint dripping position for 960 to 1040 s, and the third paint dripping position is the side of the non-outgoing line end away from the stator core, and d1 is the distance from the paint dripping point of the first dropper to the stator core. The second dropper drips paint on the bottom end of the inner circle of the outlet end, and the paint dripping flow rate V2 of the second dropper is 12g / min, wherein, paint dripping is performed at the initial paint dripping position for 650-710s, wherein d4 is 2mm, paint dripping is performed at the first middle paint dripping position for 710-850s, at this time, d4 is 10mm, paint dripping is performed at the second middle paint dripping position for 850-940s, and the second middle paint dripping position is the middle position in the length direction of the outlet end, and paint dripping is performed at the ending paint dripping position for 940-1040s, and the ending paint dripping position is the side of the outlet end away from the stator core, and d4 is the distance from the paint dripping point of the fourth dropper to the stator core.

[0155] 3. Gel.

[0156] 4. Curing.

[0157] Comparative Example 3

[0158] The steps of the preparation process of this comparative example are the same as those of Example 1, the only difference being that the inclination angle of the motor stator winding in the first paint dripping stage of the paint dripping step is different. In this comparative example, α is 8 degrees, that is, the angle between the motor stator winding and the horizontal plane is 8°.

[0159] Comparative Example 4

[0160] The steps of the preparation process of this comparative example are the same as those of Example 1, the only difference being that the inclination angle of the motor stator winding in the first paint dripping stage of the paint dripping step is different. In this comparative example, α is 15 degrees, that is, the angle between the motor stator winding and the horizontal plane is 15°.

[0161] Comparative Example 5

[0162] The steps of the preparation process of this comparative example are the same as those of Example 1, the only difference being that the speed n of the motor stator winding in the paint dripping step is different. In this comparative example, n is 10 rpm.

[0163] Comparative Example 6

[0164] The steps of the preparation process of this comparative example are the same as those of Example 1, the only difference being that the speed n of the motor stator winding in the paint dripping step is different. In this comparative example, n is 60 rpm.

[0165] It should be noted that the lengths of the motor stator windings of Example 1, Examples 4 to 6, and Comparative Examples 1 to 6 are the same, and the length of the motor stator winding of Example 2 is greater than the length of the motor stator winding of Example 1.

[0166] Test example

[0167] According to the process steps of the above embodiment and comparative example, motor stator windings were prepared respectively, and the stator slot filling rate and partial discharge inception voltage (PDIV) of the prepared motor stator windings were tested. The test results are shown in Table 1.

[0168] Among them, during the detection process of partial discharge inception voltage (PDIV), the PD (Partial Discharge) threshold is 100pC (picocoulomb), and the test voltage boost rate is 50V / s.

[0169] Table 1 Experimental data of motor stator windings of the embodiment and comparative example project Mean stator slot filling rate (%) PDIV(Vrms) Example 1 97 1440 Example 2 96 1400 Example 3 94 1350 Example 4 95 1395 Example 5 94 1360 Example 6 95 1380 Comparative Example 1 92 1150 Comparative Example 2 91 1210 Comparative Example 3 92 1290 Comparative Example 4 93 1230 Comparative Example 5 93 1310 Comparative Example 6 94 1330

[0170] According to the data in Examples 1 to 6 in Table 1, the stator slot filling rate of the motor stator winding prepared by the preferred embodiment of the paint dripping process of the present invention is 94% or above, and the partial discharge inception voltage (PDIV) is 1350Vrms, thus having good insulation performance.

[0171] By comparing Example 1 with Comparative Examples 1 and 2, it can be seen that, compared with the paint dripping process in the prior art, the motor produced by the paint dripping process of the motor stator winding of the present invention has a high stator slot filling rate and better insulation performance of the stator winding.

[0172] By comparing Example 1, Example 3, and Example 4 with Comparative Example 3 and Comparative Example 4, it can be seen that the stator slot filling rate and PDIV of Comparative Example 3 and Comparative Example 4 are lower than those of Example 1, Example 3, and Example 4. It can be seen that in the first paint dripping stage, the inclination angle of the motor stator winding is controlled at 11° to 13°, and the paint dripping effect is better, and the performance of the motor stator winding is better. Therefore, it is preferred that in the first paint dripping stage, the inclination angle of the motor stator winding is 11° to 13°

[0173] By comparing Example 1, Example 5, Example 6 with Comparative Example 5 and Comparative Example 6, it can be seen that the stator slot filling rate and PDIV of Comparative Example 5 and Comparative Example 6 are lower than those of Example 1, Example 5 and Example 6. It can be seen that in the paint dripping step, the rotation speed n of the motor stator winding is controlled at 15 rpm to 25 rpm, the paint dripping effect is better, and the performance of the motor stator winding is better. Therefore, it is preferred that in the paint dripping step, the rotation speed n of the motor stator winding is 15rpm~25rpm.

[0174] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A paint dripping process for motor stator windings, characterized in that: The paint dripping step includes a first paint dripping stage and a second paint dripping stage in sequence. In the first paint dripping stage, the motor stator winding is arranged at an angle and the non-outlet end of the motor stator winding is higher than the outlet end, the first dripper and the third dripper of the paint dripping device drip paint on the outer circle of the non-outlet end, and the first dripper and the third dripper are arranged at intervals along the length direction of the non-outlet end, and the second dripper of the paint dripping device drips paint on the inner circle of the non-outlet end; In the second paint dripping stage, the motor stator winding is arranged horizontally, the first dropper drips paint on the outer circle of the non-outlet end, the second dropper drips paint on the inner circle of the non-outlet end, the third dropper drips paint on the inner circle of the outlet end, and the fourth dropper of the paint dripping device drips paint on the outer circle of the outlet end.

2. The paint dripping process for the motor stator winding according to claim 1 is characterized in that: When the paint is dripped on the outer rings of the outlet terminal and the non-outlet terminal, the paint dripping positions are all located at the top of the outer ring of the motor stator winding; And / or, when the paint is dripped on the inner ring of the outlet terminal and the non-outlet terminal, the paint dripping position is located at the bottom end of the inner ring of the motor stator winding.

3. The paint dripping process for the motor stator winding according to claim 1, characterized in that: In the first paint dripping stage and the second paint dripping stage, the first dripping pipe continuously drips paint on the outer ring of the non-outlet end.

4. The paint dripping process for the motor stator winding according to claim 3 is characterized in that: In the first paint dripping stage, the distance between the paint dripping point of the first dripping tube and the stator core is d1, 7mm≤d1≤12mm; And / or, in the second paint dripping stage, the first paint dripping tube is switched in turn between the first paint dripping position, the second paint dripping position and the third paint dripping position; wherein, d1 at the first paint dripping position is 9mm~11mm, and d1 at the second paint dripping position is greater than d1 at the first paint dripping position, d1 at the third paint dripping position is greater than d1 at the second paint dripping position, and d1 is the distance between the paint dripping point of the first paint dripping tube and the stator core.

5. The paint dripping process for the motor stator winding according to claim 1, characterized in that: In the first paint dripping stage and the second paint dripping stage, the second dripping pipe continuously drips paint on the inner ring of the non-outlet end.

6. The paint dripping process for the motor stator winding according to claim 5, characterized in that: In the first paint dripping stage, the distance between the paint dripping point of the second dripping tube and the stator core is d2, 7mm≤d2≤12mm; And / or, in the second paint dripping stage, the second paint dripping tube is switched in turn between the fourth paint dripping position, the fifth paint dripping position and the sixth paint dripping position, wherein d2 at the fourth paint dripping position is 9 mm to 11 mm, and d2 at the fifth paint dripping position is greater than d2 at the fourth paint dripping position, d2 at the sixth paint dripping position is greater than or equal to d2 at the fifth paint dripping position, and d2 is the distance between the paint dripping point of the second paint dripping tube and the stator core.

7. The paint dripping process for the motor stator winding according to claim 1, characterized in that: In the first paint dripping stage, the third dripping pipe drips paint on the outer ring of the non-outlet end in an intermittent manner; In the second paint dripping stage, the third dripping tube continues to drip paint on the inner circle of the outlet end.

8. The paint dripping process for the motor stator winding according to claim 7, characterized in that: In the first paint dripping stage, the distance between the paint dripping point of the third dripping tube and the stator core is d3, 2mm≤d3≤3mm; And / or, in the second paint dripping stage, the third paint dripping tube is switched in sequence at the seventh paint dripping position, the eighth paint dripping position, the seventh paint dripping position, the ninth paint dripping position and the tenth paint dripping position, wherein d3 at the seventh paint dripping position is 9mm~11mm, d3 at the eighth paint dripping position is 2mm~3mm, the ninth paint dripping position is the middle position in the length direction of the inner ring of the outlet terminal, the tenth paint dripping position is the side of the inner ring of the outlet terminal away from the stator core, and d3 is the distance between the paint dripping point of the third paint dripping tube and the stator core.

9. The paint dripping process for the motor stator winding according to claim 1, characterized in that: In the second paint dripping stage, the fourth dripping pipe continues to drip paint on the outer ring of the outlet end.

10. The paint dripping process for the motor stator winding according to claim 9, characterized in that: In the second paint dripping stage, the distance between the paint dripping point of the fourth dripper and the stator core is d4, and the fourth dripper moves from the initial paint dripping position to the final paint dripping position, wherein d4 at the initial paint dripping position is 2mm~3mm, and the final paint dripping position is the side of the outer ring of the outlet terminal away from the stator core.

Images